1 # -*- encoding: binary -*-
2 # frozen_string_literal: false
11 # The semantics for TCP_DEFER_ACCEPT changed in Linux 2.6.32+
12 # with commit d1b99ba41d6c5aa1ed2fc634323449dd656899e9
13 # This change shouldn't affect unicorn users behind nginx (a
14 # value of 1 remains an optimization).
15 :tcp_defer_accept => 1,
17 # FreeBSD, we need to override this to 'dataready' if we
18 # eventually support non-HTTP/1.x
19 :accept_filter => 'httpready',
21 # same default value as Mongrel
24 # favor latency over bandwidth savings
29 # configure platform-specific options (only tested on Linux 2.6 so far)
31 [ af_name, nil ].pack('a16a240')
32 end if RUBY_PLATFORM =~ /freebsd/ && Socket.const_defined?(:SO_ACCEPTFILTER)
34 def set_tcp_sockopt(sock, opt)
35 # just in case, even LANs can break sometimes. Linux sysadmins
36 # can lower net.ipv4.tcp_keepalive_* sysctl knobs to very low values.
37 Socket.const_defined?(:SO_KEEPALIVE) and
38 sock.setsockopt(:SOL_SOCKET, :SO_KEEPALIVE, 1)
40 if Socket.const_defined?(:TCP_NODELAY)
41 val = opt[:tcp_nodelay]
42 val = DEFAULTS[:tcp_nodelay] if val.nil?
43 sock.setsockopt(:IPPROTO_TCP, :TCP_NODELAY, val ? 1 : 0)
46 val = opt[:tcp_nopush]
48 if Socket.const_defined?(:TCP_CORK) # Linux
49 sock.setsockopt(:IPPROTO_TCP, :TCP_CORK, val)
50 elsif Socket.const_defined?(:TCP_NOPUSH) # FreeBSD
51 sock.setsockopt(:IPPROTO_TCP, :TCP_NOPUSH, val)
55 # No good reason to ever have deferred accepts off in single-threaded
56 # servers (except maybe benchmarking)
57 if Socket.const_defined?(:TCP_DEFER_ACCEPT)
58 # this differs from nginx, since nginx doesn't allow us to
59 # configure the the timeout...
60 seconds = opt[:tcp_defer_accept]
61 seconds = DEFAULTS[:tcp_defer_accept] if [true,nil].include?(seconds)
62 seconds = 0 unless seconds # nil/false means disable this
63 sock.setsockopt(:IPPROTO_TCP, :TCP_DEFER_ACCEPT, seconds)
64 elsif respond_to?(:accf_arg)
65 name = opt[:accept_filter]
66 name = DEFAULTS[:accept_filter] if name.nil?
67 sock.listen(opt[:backlog])
68 got = (sock.getsockopt(:SOL_SOCKET, :SO_ACCEPTFILTER) rescue nil).to_s
71 sock.setsockopt(:SOL_SOCKET, :SO_ACCEPTFILTER, arg)
73 logger.error("#{sock_name(sock)} " \
74 "failed to set accept_filter=#{name} (#{e.inspect})")
75 logger.error("perhaps accf_http(9) needs to be loaded".freeze)
80 def set_server_sockopt(sock, opt)
81 opt = DEFAULTS.merge(opt || {})
83 set_tcp_sockopt(sock, opt) if sock.local_address.ip?
85 rcvbuf, sndbuf = opt.values_at(:rcvbuf, :sndbuf)
87 log_buffer_sizes(sock, "before: ")
88 sock.setsockopt(:SOL_SOCKET, :SO_RCVBUF, rcvbuf) if rcvbuf
89 sock.setsockopt(:SOL_SOCKET, :SO_SNDBUF, sndbuf) if sndbuf
90 log_buffer_sizes(sock, " after: ")
92 sock.listen(opt[:backlog])
94 Unicorn.log_error(logger, "#{sock_name(sock)} #{opt.inspect}", e)
97 def log_buffer_sizes(sock, pfx = '')
98 rcvbuf = sock.getsockopt(:SOL_SOCKET, :SO_RCVBUF).int
99 sndbuf = sock.getsockopt(:SOL_SOCKET, :SO_SNDBUF).int
100 logger.info "#{pfx}#{sock_name(sock)} rcvbuf=#{rcvbuf} sndbuf=#{sndbuf}"
103 # creates a new server, socket. address may be a HOST:PORT or
104 # an absolute path to a UNIX socket. address can even be a Socket
105 # object in which case it is immediately returned
106 def bind_listen(address = '0.0.0.0:8080', opt = {})
107 return address unless String === address
109 sock = if address.start_with?('/')
110 if File.exist?(address)
111 if File.socket?(address)
113 UNIXSocket.new(address).close
114 # fall through, try to bind(2) and fail with EADDRINUSE
115 # (or succeed from a small race condition we can't sanely avoid).
116 rescue Errno::ECONNREFUSED
117 logger.info "unlinking existing socket=#{address}"
122 "socket=#{address} specified but it is not a socket!"
125 old_umask = File.umask(opt[:umask] || 0)
127 s = Socket.new(:UNIX, :STREAM)
128 s.bind(Socket.sockaddr_un(address))
131 File.umask(old_umask)
133 elsif /\A\[([a-fA-F0-9:]+)\]:(\d+)\z/ =~ address
134 new_tcp_server($1, $2.to_i, opt.merge(:ipv6=>true))
135 elsif /\A(\d+\.\d+\.\d+\.\d+):(\d+)\z/ =~ address
136 new_tcp_server($1, $2.to_i, opt)
138 raise ArgumentError, "Don't know how to bind: #{address}"
140 set_server_sockopt(sock, opt)
144 def new_tcp_server(addr, port, opt)
145 # n.b. we set FD_CLOEXEC in the workers
146 sock = Socket.new(opt[:ipv6] ? :AF_INET6 : :AF_INET, :SOCK_STREAM)
147 if opt.key?(:ipv6only)
148 Socket.const_defined?(:IPV6_V6ONLY) or
149 abort "Socket::IPV6_V6ONLY not defined, upgrade Ruby and/or your OS"
150 sock.setsockopt(:IPPROTO_IPV6, :IPV6_V6ONLY, opt[:ipv6only] ? 1 : 0)
152 sock.setsockopt(:SOL_SOCKET, :SO_REUSEADDR, 1)
153 if Socket.const_defined?(:SO_REUSEPORT) && opt[:reuseport]
154 sock.setsockopt(:SOL_SOCKET, :SO_REUSEPORT, 1)
156 sock.bind(Socket.pack_sockaddr_in(port, addr))
160 # returns rfc2732-style (e.g. "[::1]:666") addresses for IPv6
162 port, addr = Socket.unpack_sockaddr_in(sock.getsockname)
163 addr.include?(':') ? "[#{addr}]:#{port}" : "#{addr}:#{port}"
165 module_function :tcp_name
167 # Returns the configuration name of a socket as a string. sock may
168 # be a string value, in which case it is returned as-is
169 # Warning: TCP sockets may not always return the name given to it.
172 when String then sock
177 Socket.unpack_sockaddr_un(sock.getsockname)
180 raise ArgumentError, "Unhandled class #{sock.class}: #{sock.inspect}"
184 module_function :sock_name
185 end # module SocketHelper